Means for anchoring bolts



MEANS FOR ANCHORING BOLTS May 24, 1927.

MIRZAN Filed March a Patented-"Mayt24, 1927. a I ll 7 wiMl F ANs F oR anci fi BOLTS; p v T, i

I jnlbolt anchors, "designed for securinglbolts ,tiyely -ja topplanyand a central vertical sec and .rods to stone, brick. and concrete fcohofa slightlyinodified anchoring unitsstruction, and has for-its object.tqproyide In, the drawing, QQ rePresentsa bed or 5 simple, inexpensive and efficient anchoring slab ofl'con'crete, ainwhichlhas been drilled 7" k This invention relates to improvements ghard ineta-llelenients, 'AndfFigQG is r'esp ec- 1 means, adapted for'use lin connectionwith afhQleI2jfor the boltfilandflthe ancl1or,ftheeither new or old inasonryyyorki 1A gfurtlier latter being designatedgnerally by. thenu; Object is to provide reliable andxextremely lneral'l. 'Accordingtojliligsl li and 2,.u1'e powerful anchoring means, which may be anchor comprises a numberof similar units a i0 applied to bolts or rods of different size, or sections, .ias 4:,ea'ch o fY'W hich consists of I and whereinthe bolts may .be adjusted star shaj'ped enyelopA preferably made "or either before-or afterthe parts .have been Qlead, @an 'dwhavirig radial arms 4 inhwhich embedded infthe work. i A further "object are einb'eddedloblongbars:of steel or,iron, as is to provide, an anchor comprising 'a' nu'n "5, asl'bsti'seen in. Fig.-- f2 .lThe circular body 15 ber of similar units, Wl1ich .;1 nay be einployeiil',,portions fl of, the .units be 'cast' with singly or collectivelyfand"are'preferably centi al"openings,' as 4?, the' said'openings be- To threaded .for facilitating their, ready and viingpreferably smaller'than the diameter of Vpositive'attachment to the bolts; the said the boltf3, iso thatfthe said openings may units preferably being so "constructed "and begrearned out andthrea-ded, for application- 20 arranged as to expand radially under stress tothethreadedportion"3. ofgthe'bolt, like a exerted bythe bolts, as forexarnplgwhen ,nutl For diflerent' sizebolts,the bars-5, as the latterare subjected to great strains lon- 'iyell asfthe pl iable jackets {Rand the opengitudinally, for,preventing yielding ,IllOVG- ings fl be.suitably proportioned for mentor Withdrawal ofthebolts. Eaeh riunit the; seyeralfsiz es., .lnrallllcases, however, it ofthe anchor preferablycomprises acentral .isfp referredlto' so'ldisposethe bars:5 ,"that body and a plurality ofarrns which radiate fromth-e body, the said-armsbeinginclined path of the tap, by whieh 'the" central openupwardly 'at suitable angles relatively to'iings l zarethreaded., Bythisf arrangeinent, the axis of thecentral bo dy,n, for enabling the ,tlie harder and stifferjcores v5 b'e corr1e inti- 30 said units to,be stacked and closely ,jnterfit "rnately interlocked with the threads of the Y ted; each of the severaharms iof the units bolt.3,.and" enables the units to Withstand 8 comprising'anoblong core of steeljor iron radialfthri sts,iwhenlongitudinal stress is I preferably rectangular incross-se'ction, :andfiapp1iedgto" theibfolt, as in the direction-of the said cores preferably being funiformly gthe arro'v'v's' in liigs; 1an d l3; Flhefarrns e fof n y dii Med y p o ii -b a ie" a sp em y sp s d at J jacket, which maybe-integral with thejcerr (for eiraniple to th e horizontal,

tral body, by which thex b arsiare suitably as shown inlFig.11, and When'a number of spaced and adjustablysecuredxto theboltl Iare'required, iniorderl to afford, ade-' .1 attain-these: objects. by the means set' lquatelianchora'ge ,Lf'for. {certain construction forth intherdetailed description whichsi ol- Worl the uiiits inay ,be readily stacked, in lows, and as.illustratedbytheqacc ornpany -closei order,.as shownihFigl-l,and all said ing drawing, in' which j 1' F L "units ibeingfl-sirnilarly, threaded, the whole Figurelds. a jai'tialside eleyati on and istfac lc'ma'ybe screwed-on.tothe-bolt'3, like a partial "Central longitudinal section joffione anut bef oregthe deyice is'set inthiesocketor i form'ofmy invention;.zshowing a'boltfitted ,2j qf the concrete. :Whentheboltwith. separable anchoring units-that areieni- (bedded .inaconcreteijwork. .Fig. 2 is :a.'top Q tioried initherhole,QQ -Ythalatter isflusuall'y .plan view off.oneoffthe' unitsottheanchor; Efille'd lwi'thrg rout,indicated are {rheg ouc' I 13.".is (an 'elevati'onalyieyv;...showing a is. usually sem i-liquid and "readilyjsearches number-of -anchori'g'units hayingla,greater routiai d. fills all'lthelljoints fand' crevices of partnerof -radiating arms :collectiuelyijenthe-anchor ia'; we11 'thej cayities ofthe velop'ed in a j'acket of lead. fi .;Fig.'-4;isabroken aidjacentjconcrete:Walls, and jvhen the grout top-pla'nview of the same. 1Eig5 i's're'sp'ec .-beconies gs'et',,the bolttandlrelatedparts are 'tivelyaplan', and amend VieW,-of-o'neofthe fiiiliiiotiably l 1 lid in .place. ,T he leaden' en their-inner or facing ends project into the withfthelanchdrylTapplied js suitably po i- 10d 'velop 4 has for its primary object to provide a convenient and suitable support for w the independent bars 5.

7 By forming the outer ends of the arms 4 square and inclining the arms, theends-of the corresponding arms when several units are stacked, as shown in Fig. 1, present ser- ,tent by. the close stacking or serried are 'rangement of l the arms.v By this construction andarrangement, strains exerted longitudinally ofthe bolt are communicated to and apportioned between the radial arms of the units, which in turn exert their proper proportion of the bolt-strains substantially in the direction of the inclined planes of the arms, and accordingly directly against and at right angles to the abutments 2*, and in case the stress on the bolt is increased to an extraordinary degree that not even the concrete may withstand, the latter .will tend to shear or fracture along the oblique lines 2 (see Fig. 1)." In .such event the bolt, together with a relatively large inverted coneshaped fragment of the concrete lying above the lines 2, will become. detached from the main bed or slab 2.

The modification shown in Figs. 3 and4, consists principally of increasing the number of radial'arms or. ribs, as 6, and casting a single envelop, as .6. that embraces and conceals all of the hard metal cores, as 5*, which may follow the construction shown in Figs. 1 and 2. ,By this modification, the anchor may be handled as onepart, and is preferably threaded throughout its length for screwing on to the bolt 3. The several bars 5 preferably make threaded contact with the bolt, as'shown in Fig. 4. This unitary anchor is suitable for extremely heavy work, that is capable of substantially exact computation for predetermining the size and strength of the anchor, and is not subject to alteration for'either decreasing or increasing the dimensions of. the anchor. In applying the envelop 6, the outer faces 6, .of the radial ribs 6 are preferably serrated. the same as the lighter anchor of Figs. "1 and 2, and when this unitary. anchor is called upon to resist longitudinal stress of the bolt 3, the. serrated portions 6*, of the ribsfi become interlocked with the correspondingly shaped abutments 2*, and as these abutments. all face toward the axis ofthe bolt and anchor, they efiectuallyresist the longi.

These serrated joints provide for tudinal displacement of the anchor. The

hard metal cores 5 form a rigid bridge or brace between the bolt and the abutments 2 and the said braces being'disposed at right. anglesto the faces of said abutments and beingspaced equidistantly around the'bolt, as shown in Fig. 4, the anchor is capable of resisting the greatest strains the bolt and concrete may withstand, without destruc.

tion of one or the other of said parts.

In Fig. 6 is illustrated an anchor unit 7,

which preferably comprises one part of any suitable metal, havinga number of arms? that radiate fromj a threaded concentric opening 7 for detachably applying the un t t0 bolt as 3'1, the said arms preferably 2 being formed at an angle similar tothe arms 4*, and, belng supported and connected by webs '7 that 'lie in the planes 'of'the arms.

Having thus described my invention,

'what- I claim, is'' 1. An anchoring unit for screw bolts, comprising a concave arrangement of metallic bars spaced equidistantly to form a central opening, the corresponding ends of said bars being threaded for attachmentto a bolt, the said bars being embedded and held in place by a matrix of softer material (e. lead), and the said'unit andthe corresponding portion of the bolt adapted to be. embedded in concrete.

2. composite anchor for bolts andthe like, comprising a number of unitscof the character set forth inclaim 1,.saidunits 1y, to the axisof the bolt, and corresponding partsof the bolt-and said unit adapted'to;

be'embedded in concrete. g V, p I

4. An anchor unit comprising aQplur'ality of metallic bars arranged radially from a center to form an'opening, thein nerportions of the bars at .the opening being threaded for interlockingthe unit to'a bolt, the said bars being connected at their inner ends'by a common ring-like bodv adapted to hold the bars in contact with the bolt. and

relatively to the axis'of' the bolt, ainumber i the bolt, and said anchor and the correjisponding portion of the bolt adapted tobe ilembedded. in concrete. 1 V

5. An expansible anchor for boltsand-the like, comprising an "an'nularbodyof "soft said bars being -.correspondingly inclined posed at an inclinationto the planeof arms and in 'lation, and

metalhaving its inner circumference threaded for receiving the threaded bolt, and having ence of the body, said cores being wholly enveloped by the material of said body and arms, and said arms when molded being disci sai body portion for resisting longitudinal movement of the bolt. f

6. In an anchor for bolts and the like, the combination with a threaded bolt adapted to be embedded in a slab of concrete, of an anchor comprising a plurality fof similar each unit consisting of a body of nonunits, ferrous metal having a central threaded opening for attachmentto the bolt, and having radial arms thatincline upwardly, cores that become. interlocked withthe concrete and resist longitudinal movement of the bolt and anchor. v

7. An anchor for bolts and the like, comprising a plurality of similar units, each unit comprising a central body of lead having a plurality of radial upwardly inclining arms, said units adapted to be stacked, the corre-' sponding arms of'the units overlying each other and forming similar longitudinal ribs whose free extremities are serrated and adapted to become interlocked with concrete or grout when the anchor is embedded there in, said central body being internally threadedfor attachment to the threaded portion of a bolt, and stiff ferrous metal cores em- I bedded in and reinforcing theleaden arms, and said cores being in direct contact with the threads of the bolt. g u

8. The combination with a bolt having a portion of a radial arms reinforced by cores of hard metal, the inner ends of'said 1 cores coinciding with the inner circumferchoring units the bolt like nuts, each threaded portion adapted to be embedded in of. a plurality of superposed anhaving similar body portions bored out and threaded forattachment to bodybeing formed a plurality of radial arms,- said body arms consisting of pliant tenacious concrete,

with and metal, and thesaid arms being bent upwardly at corresponding angles to the plane of the body,

and bars of hard metal like the bolt being embedded in said arms, said bars the bolt and reinforcing the pliable arms adapted to thrust radially for resisting dislodgment of the bolt. .7

9. The combinatlon wlth a bolt having a threaded portion adapted to be embedded plurality of anchoring in, concrete, of a 7 units comprising ring-like bodies internally threaded for attachment'to, the bolt, and

having radial arms inclining upwardly, said.

bodies and their. arms being composed of.

lead-like metal'and adapted to be'appliedto I the bolt'like nuts, and reinforcing cores. of metal of the hardness of the bolt, being encased In said arms, the inner ends of said cores 7 being" 'in direct contact with the being in direct contact with the threads of threads of the bolt andtheir sheathed outer ends being embeddedin theconcrete and resisting dislodgment and withdrawal of the tudinal stress.

10. An anchor unit comprising a plurality of metallic bars that radiate froma ring circumference of said body and the said ends [of the bars being threaded for interlocking the unit toabolt, said unit and the threaded portion of the bolt: adapted to be embedded in concrete, and'said body adjacent said bars adapted to flex for enabling the bars to thrust radiallywhen the bolt is subjected to longitudinal stress. i

'In testimony whereof I affix my signature.

RICHARD A. MIRYZAN.

bolt when theclatter is subjected longilike. body, the corresponding ends of said bars-being embedded in the body, the inner 

